How to Start a Business in Illinois in 2026
How to Start a Business in Illinois in 2026
Illinois is home to Chicago, one of the most important business cities in the world. It's the third-largest metropolitan area in the United States, a global hub for finance, commodities, logistics, manufacturing, and a growing tech scene. If you are starting a business in Illinois, particularly in or around Chicago, you are in a large and deep market with real competitive dynamics.
Here is what you need to know to form your business correctly and understand the ongoing requirements.
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Why Illinois Is a Significant Market
- Chicago metro: 9+ million people, the third-largest U.S. metro and a major center for logistics, finance, and professional services
- Central location: Chicago's position as a transportation and distribution hub makes it ideal for product-based businesses serving national markets
- Diverse economy: Manufacturing, agriculture, healthcare, finance, food, and a rapidly growing tech sector (particularly fintech and logistics tech)
- Major universities: University of Chicago, Northwestern, UIC, and others create a constant pipeline of talent and research
- O'Hare International Airport: One of the busiest airports in the world, with easy access to national and international markets
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Step 1: Name Your Illinois LLC
Your LLC name must:
- Be unique in Illinois. Check at the Illinois Secretary of State Business ServicesIllinois Secretary of State Business Serviceshttps://apps.ilsos.gov/businessentitysearch/
- Include "Limited Liability Company," "L.L.C.," or "LLC"
- Not include restricted words like "bank," "insurance," or "university" without additional approval
Name reservations are available for 90 days for a $25 fee.
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Step 2: File Articles of Organization
File online at [Illinois Secretary of State](https://www.ilsos.gov)
Filing fee: $150 online
Processing time: Online filings typically process within 1-5 business days.
Required information: LLC name, registered agent name and Illinois address, principal office address, management structure, and organizer signature.
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Step 3: Appoint an Illinois Registered Agent
Your registered agent must have a physical Illinois street address and be available during business hours. You can serve as your own registered agent if you have an Illinois address. Registered agent services cost $50-$150/year.
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Step 4: Get Your EIN
Free at IRS.gov/EINIRS.gov/EINhttps://www.irs.gov/businesses/small-businesses-self-employed/apply-for-an-employer-identification-number-ein-online. Takes about 5 minutes.
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Step 5: Understand Illinois Taxes
State income tax: Illinois has a flat income tax rate of 4.95% on individual income. LLC income passes through to your personal return and is taxed at this rate.
Illinois personal property replacement tax: LLCs in Illinois owe a 1.5% tax on net income (profits, not gross revenue). This is in addition to the regular income tax and is paid directly by the LLC rather than passed through to owners. It's a relatively small additional obligation but one that surprises founders who don't know about it.
Sales tax: Illinois state sales tax is 6.25% on most tangible goods. Combined with Chicago and Cook County additions, Chicago's total sales tax rate reaches 10.25%, one of the highest in the country. In most of the rest of the state, combined rates range from 6.25% to 9%.
Register for a Certificate of Registration with the Illinois Department of Revenue (IDOR)Illinois Department of Revenue (IDOR)https://www.illinois.gov/rev if you sell taxable goods or services. Registration is free.
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Step 6: File an Annual Report
Illinois LLCs must file an Annual Report with the Secretary of State.
Fee: $75 per year
Due date: The first day of the month your LLC was formed each year (e.g., if formed in June, due June 1)
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Step 7: Chicago-Specific Requirements
If your business operates in the City of Chicago, there are additional requirements beyond the state level.
Chicago Business License: Most businesses operating in Chicago require a City of Chicago business license, issued through the Chicago Business Affairs and Consumer Protection (BACP)Chicago Business Affairs and Consumer Protection (BACP)https://www.chicago.gov/city/en/depts/bacp.html department.
Chicago home occupation rules: If you work from home in Chicago, there are specific zoning rules about what commercial activity is permitted in a residential unit. Check with the city before using your home address as your primary business location.
Chicago sales tax: As noted, combined sales tax in Chicago reaches 10.25%. If you sell taxable goods in Chicago, make sure your point-of-sale system is applying the correct rate.
Chicago minimum wage: Chicago has its own minimum wage requirements that exceed the state minimum. As of 2026, the Chicago minimum wage is $16.20/hour for businesses with 21+ employees and slightly lower for smaller employers, indexed to inflation.
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Industry-Specific Notes for Illinois
Logistics and distribution: Chicago is one of the premier logistics hubs in the country. If you are in any business involving product movement, fulfillment, or distribution, the infrastructure and talent base here is exceptional.
Food and beverage: Chicago has a world-class food culture and a significant food manufacturing presence. The Chicago Food Truck Permit system, the Cottage Food Operation rules for home-based food businesses, and the Department of Public Health permitting process are all relevant depending on your food business type.
Finance and fintech: Chicago is the home of the CME Group and a major center for financial services and fintech. If your business has any connection to finance, the ecosystem here is meaningful.
Manufacturing: Illinois, particularly outside Chicago, still has significant manufacturing infrastructure. The Illinois Manufacturers' Association and state economic development programs offer resources for manufacturers.
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Quick Cost Summary
| Item | Cost |
|---|---|
| LLC Formation (Articles of Organization) | $150 |
| Name Reservation (optional) | $25 |
| Registered Agent Service (optional) | $50-$150/year |
| Annual Report | $75/year |
| EIN | Free |
Total first-year cost: $275-$400
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Illinois is not the easiest state to navigate, particularly in Chicago where local requirements layer on top of state requirements. But the market access that Chicago provides is legitimate, and for many types of businesses, being in the Chicago metro creates competitive advantages that outweigh the complexity.
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